Water is drained out of an inverted cone, having the dimensions depicted in the figure Let V be the volume of water in the tank and let h be the depth of the water. Write below. If the water level drops at 4 ft/min, at what rate is water (in ftalmin) draining from an equation that relates V and h- the tank when the water depth is 4 ft? I: (Type an exact answer, using at as needed.)